The mayor called it "deeply, deeply troubling" the woman still had a license, which has since been suspended.

New York Mayor Bill de Blasio is joined by his wife Chirlane McCray and Councilman Brad Lander at a memorial at the site of an accident where two small children were killed by a driver in Brooklyn, March 7, 2018.

"Something is wrong with our laws that we need to fix," de Blasio said. He promised to offer specifics next week.

"I wish she was under arrest right now," the mayor added.

Chan declined to elaborate on Bruns' medical condition, but one witness reported the driver was foaming at the mouth. Investigators are subpoenaing her medical records.

“Any life lost in a traffic fatality is bad but our children are our most valuable treasures in our lives and to lose these two children, we know all New Yorkers feel for this particular family,” Chan said.

People stand at a memorial at the site of an accident where two small children were killed by a driver on March 6 in Brooklyn, March 7, 2018.